Performance and mechanism of simultaneous nitrification and denitrification in zeolite spheres internal loop airlift reactor

被引：12
|
作者：
Wen, Xiaojing [1 ,2 ]
Liang, Donghui [1 ,3 ]
Hu, Yongyou [1 ,2 ]
Zhu, Xiaoqiang [2 ,4 ]
Wang, Guobin [4 ]
Xie, Jieyun [4 ]
机构：
[1] South China Univ Technol, Guangzhou Higher Educ Mega Ctr, Sch Environm & Energy, Guangzhou 510006, Peoples R China
[2] South China Univ Technol, Guangzhou Higher Educ Mega Ctr, Key Lab Pollut Control & Ecosyst Restorat Ind Clus, Minist Educ, Guangzhou 510006, Peoples R China
[3] Zhongkai Univ Agr & Engn, Coll Urban & Rural Construct, Zhongkai Rd, Guangzhou 510225, Peoples R China
[4] Guangzhou Pengkai Environm Technol Co Ltd, Guangzhou 511493, Peoples R China
来源：
BIORESOURCE TECHNOLOGY | 2023年 / 380卷
基金：
中国国家自然科学基金;
关键词：
Zeolite; Internal loop airlift reactor; Simultaneous nitrification and denitrification; (SND); Adsorption; New bio-packing; BED BIOFILM REACTOR; AMMONIUM WASTE-WATER; NITROGEN REMOVAL; CONSTRUCTED WETLAND; OXYTETRACYCLINE OTC; BACTERIUM; DEGRADATION;
D O I：
10.1016/j.biortech.2023.129073
中图分类号：
S2 [农业工程];
学科分类号：
0828 ;
摘要：
An internal loop airlift reactor was constructed with zeolite spheres as biofilm carriers (ZS-ALR), and the per-formance and mechanism of nitrogen removal were investigated. The results indicated that the TN, NH4+-N and TOC removal efficiencies of ZS-ALR reached 96.12%, 100% and 94.54% under appropriate conditions (HRT of 6-8 h, aeration rates of 80-120 mL/min, C/N ratios of 4-6), and the highest TN removal rate constant was 0.01156 min-1. Further investigating the influence of ammonia-N concentrations on nitrogen removal and biofilm stability revealed that catabolism was important in TN removal, and the prominent genera for nitrogen removal included Sphaerotilus (42.20%), Flavobacterium (17.47%) and Fusibacter (6.14%). Meanwhile, the abundance of amoA, napA, narG and nosZ genes was markedly influenced by ammonia-N concentrations. The nitrogen removal of ZS-ALR was mainly through ammonia-N adsorption by zeolite spheres and simultaneous nitrification and denitrification by biofilm.
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页数：10
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